1. Hard anodized and sand blasting aluminum alloy material has high compression strength, corrosion and wear resistance.2. Ducted propellers with hydromechanics design has high impact strength, resistance to wear, acid and alkali, and good rigidity.3. Watertight connectors are made of stainless steel, resistant to acid, alkali resistant and corrosion.4. Motor with unique design provides smooth operation and strong power.5. Cable is made of polyurethane material, with high compression strength, high abrasion and corrosion resistance.6. Specially designed for ROV, AUV, RC boats and other underwater vehicles.7. Small size with high efficiency and large thrust, flexible and easy to control.